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Effects of neutrophil-lymphocyte ratio on renal function and histologic lesions in patients with diabetic nephropathy.

Nephrology 2018 October 23
AIM: Chronic low-grade inflammation related to diabetic nephropathy (DN) may affect the serum neutrophil-lymphocyte ratio (NLR). We aimed to examine the cross-sectional relationships of NLR with renal function and structural lesions of DN in patients with type 2 diabetes mellitus (T2DM).

METHODS: The study retrospectively included 247 patients with T2DM and biopsy-proven DN. The severity of different pathological lesions was evaluated based on the criteria of Renal Pathology Society. The patients were divided into two groups based on the median (2.42) of NLR level, group 1: NLR < 2.42 (n = 122) and group 2: NLR ≥ 2.42 (n = 125). Renal dysfunction was defined by estimated glomerular filtration rate less than 60 mL/min per 1.73 m2 . The influence of NLR on renal dysfunction was evaluated using logistic regression analysis.

RESULTS: The spearman's rank-correlation test indicted that NLR was positively correlated with interstitial fibrosis and tubular atrophy (r = 0.170, P = 0.007) and serum fibrinogen (r = 0.261, P < 0.001), whereas negatively related with estimated glomerular filtration rate (r = -0.233, P < 0.001). However, the NLR level demonstrated no association with glomerular lesions, interstitial inflammation and arteriolar hyalinosis. A multivariate logistic regression analysis showed that higher level of NLR (≥2.42) was significantly associated with renal dysfunction when adjusting for some important baseline clinical and pathological variables (odds ratio, 2.46; 95% confidence interval, 1.21-4.97; P = 0.012).

CONCLUSION: Increased NLR affects renal function and histologic lesions in patients with T2DM and may be an important factor for the progression of DN.

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